EP 0451503 A3 19921119 - GLASS FIBRE-REINFORCED GYPSUM PANELS AND PROCESS FOR THEIR MANUFACTURE
Title (en)
GLASS FIBRE-REINFORCED GYPSUM PANELS AND PROCESS FOR THEIR MANUFACTURE
Publication
Application
Priority
DE 4011793 A 19900412
Abstract (en)
[origin: US5173364A] Glass fibre reinforced plasterboard comprising a gypsum matrix of high density with embedded staple glass fibres therewith forming a pressure resistant solid body frame in which are embedded a plurality of very small hollow spaces of 5-350 mu m diameter, produced by a fine-pore foam or at least partially by small particles of non-porous and non-water absorbing fillers. During the manufacturing process of such glass fibre reinforced gypsum board, the gypsum and the fibre pieces are given only so much water that the water/gypsum ratio does not exceed 0.6, whereafter a foam and/or pourable or free-flowing fillers are added in such quantities that the apparent density of the entire board is at least 20% smaller than the density of the bonding means component of the matrix and the paste are subjected while being formed, to a vibration.
IPC 1-7
IPC 8 full level
C04B 28/14 (2006.01)
CPC (source: EP US)
C04B 28/14 (2013.01 - EP US); Y02W 30/91 (2015.05 - EP US); Y10T 428/24942 (2015.01 - EP US); Y10T 428/249968 (2015.04 - EP US)
Citation (search report)
- [E] EP 0490160 A1 19920617 - SICOWA VERFAHRENSTECH [DE]
- [YD] GB 1437040 A 19760526 - NAT RES DEV
- [Y] GB 696169 A 19530826 - ALUMINUM CO OF AMERICA
- [Y] DE 3524115 A1 19870108 - SCHEUNEMANN RUEDIGER DIPL ING
- [A] DE 1033123 B 19580626 - SAINT GOBAIN
- [A] WORLD APTENT INDEX LATEST, Derwent Publications Ltd., LONDON, GB; Week 7627; & JP-A-51 056 824 (Nitta Belt KK) 15-05-1976
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0451503 A2 19911016; EP 0451503 A3 19921119; EP 0451503 B1 19970813; AT E156791 T1 19970815; DE 4011793 C1 19911212; DE 59108821 D1 19970918; DK 0451503 T3 19971229; ES 2104622 T3 19971016; GR 3024479 T3 19971128; US 5173364 A 19921222; US 5330691 A 19940719
DOCDB simple family (application)
EP 91103392 A 19910306; AT 91103392 T 19910306; DE 4011793 A 19900412; DE 59108821 T 19910306; DK 91103392 T 19910306; ES 91103392 T 19910306; GR 970402118 T 19970819; US 68110891 A 19910405; US 94120992 A 19920904